Improvement in the manufacture of lined straw-board



B. F. FIELD.

Manufacture of Lined S-traw Board;

No,lv66,087.

2S'heetsP-Sheeft `2'.

s'. r. FIELD.

lManufature of Lined Str Board.l atented July 2.7, 1875.

W" TNESSES N. PETERS. PMomu'mDGRAPl-IER. wAsmNaToM n c UNrrnD STATES FICE- BENJAMIN FFFIELD, OF FOND DU LAG, WISCONSIN.

IMPROVEMENT IN THE MANUFAQTURE,QFy LINED STRAW-BOARD.

Specification forming part of Letters Patent No. 166,087, dated July 27, 18775; application filed 1 June 8, 1875.

To all whom t 'may concern:

Be it known that I, BENJAMIN F. FIELD, of Fond du Lac, in the county of Fondl du Lac and State of Wisconsin, have invented new' and useful Improvements in the Manufacture of Lined Straw-Board; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings forming part of this specication, in which- Figure l is a perspective view, representing a section of a straw-board machine having a lining apparatus and a coloring and smoothing apparatus attached; and Fig. 2 is a longitudinal vertical section of the same.'

Similar lettersof reference in the accompanyin g drawings denote the same parts.

In preparing straw-board for box making and other similar purposes, it is necessary that the board should have a comparatively smooth surface imparted to it, which surface must be of uniform color, White, grey, blue, or other shades diering from the natural color of the straw-board being generally preferred by the trade. Such colored surface is given to the board by lining it With white or tinted liningpaper of good quality, and, as heretofore applied, the lining-paper must be of considerable thickness in order to prevent the tawny color of the board from showing through, and the felt marksv and other inequalities from plainly appearing. Such thick heavy liningpaper is comparatively expensive, and adds materially to the cost of producing good board for the purposes mentioned.

The object of this invention is to avoid the necessity and save the expense of using such thick heavy lining-paper, by enabling equally as good or better results to be reached by the use of the thinnest and lightest varieties of paper which heretofore could not be applied to the purpose of lining at all. To this end the invention consists, iirst, in a process or mode of surfacing straw-board and other thick dark-colored paper-board, to wit, by first colorin g and smoothing the surface of such board, and then lining it over the coloring matter with thin paper; and it consists, secondly, in mechanism adapted to carry out such process, substantially as I will now proceed to set forth.

In the drawings, D Dl D2 D3 D4 are some of the driers of an ordinary straw-board machine, over which the board, in the process of manufacture, passes in continuous lengths from right to left, as shown at B, in Fig. 2, being guided in its course by the driers act-- ing conjointly with suitable guide-rolls g g1 g2 g3 g4. L is the roll from which the lining-papaper l is fed, said roll being provided with any suitable tension apparatus. A is the pasting mechanism which coats the under side of the sheet l with a thin film of paste, and P is he pressure-frame and rolls which unite the lining-paper to the straw-board. All these parts are of any suitable form and construction, such as are ordinarily employed for pasting thin lining-paper upon strawboard by machinery, and, preferably, such as are described in my Letters Patent dated January 6, 1874, No. 146,240. C is the coloring andsmoothing apparatus by which I apply a coating of coloring matter to the board, and smooth it down thereon, after the board has been made and partially dried, and before it receives the liningpaper. structed in any suitable manner, although I prefer to use mechanism similar to the pasting mechanism A, namely, a suitable box, m, to contain the coloring paste or liquid 5. an adjustable gage-roll, n, driven by gearing in a direction opposite to the movement of the sheet, and at aboutthe same velocity as the sheet; a color or paste-roll, o, driven by gearing slightly faster than the roll n, and in the opposite direction, for the purpose of smoothing and spreading the color-paste; and a guideroll, g2, which properly directs the c-ourse of the sheet and keeps it in contact with both rolls n o. 'Ihe guide-roll should be adjustable, and is, therefore, mounted on a hinged frame, p, one end of which is supported by the chain It; but it should not press with its weight upon the straw-board, as it might cause it to part occasionally in Weak places, or when not sufficiently dried, and, besides, it would squeeze out the paste so that the coloring would be imperfect.

rEhe coloring apparatus may be arranged at any suitable place among the driers, where the straw-board Will have become partially dried before reaching it, so as to be in a lit condition for receiving the coloring material 5 This apparatus may be conbut one-or more driers shouldE always operate between the coloring apparatus and? the'pastin g apparatus, in order that the wet coloring dye or paste maybe dried in before the lining,- paper is applied. The direction of the strawboard is so changed` by the drier D1, lor other sented to receive the lining-paper. A good coloring material may be obtained froma mixture of Georgia clay, twelve parts, and common glue, one part, or about in that proportion, with water enough to render the mixture about the consistence of paste, and with or without any pigment to color it. This mixture fills up the inequalities in the surfaceofthe board, and to a great extent obliterates the felt-marks, andwhc'n dried by thefroll or rollsDl adheres vfirmly to the board, forming a hard smooth base for the lining-paper'. I do'not limit myself, however, to this mixture,l but may use any other that will be found to answer the purpose as well or' better.

The coloring and' pasting apparatus' maybe duplicated and applied to the coloring and lining of both sides of the board", if desired.

It ivsnot' necessary for me here to'desc'ribe suitable modifications for such purpose, as" any mechanic skilled in thel art' willk beable to accomplish it fromhis knowledge'of the art,- after becoming familiar wi'th'the operation of the mechanism above'described'. y

The surface of the straw-board being thus prepared and colored preli'min'arily to the' ap'- plication of the lining-paper, the latter need not bev of the fme quality heretofore necessary, but may be of the thinnest andy lightest material, even tissuepaper being su'flicient for the purpose. If the lining-paper is white,

paste, as it shows through the thin paper.

Having thus described myinvention, I claim as newequivalent means', that its colored side is prel l". The mode or process ofr finishing strawboard, and other coarse dark paper-boards, by coating. or dyeing one or both surfacesz with coloring material, and afterward lining such colored surface with thin lining-paper, substantially as and for thepurposes set forth.

2L As an article of manufacture, straw-board,

'or Yother dark heavy paper or board, lined' with thin paper, and having a coating or wash of coloring material, or colorin g and smoothing material, applied between the lining and the board, substantially as described.

3. Thev combination of a strawLboard macliine with an apparatus for applying lining'- pap'er, and an apparatus for coloring or sizing the surface of the board preparatory to the application of the lining-paper, substantially as described.

4:. The' combination of aystraw-board inachine, driers for partially drying' the strawboard, a coloring apparatus for' coloring the st irfacel of the board, additional1 driers for drying in orfhardeni'ng the coloring material, a lining apparatus, and7 finally, other drie'rs to dry the lining-paste, all operating in the orderand for the purposes set forth. K

Witness my hand at Washington, D; C., this 30th day of May, A. D'. 1875. l

BENJAMIN F. FIELD. Witnesses:

H. A. HALL, M.A CHURCH. 

